/*
 *
 *  Copyright (C) 2000 Silicon Graphics, Inc.  All Rights Reserved. 
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 *  Mountain View, CA  94043, or:
 * 
 *  http://www.sgi.com 
 * 
 *  For further information regarding this notice, see: 
 * 
 *  http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 */

#ifndef __gluknotvector_h_
#define __gluknotvector_h_

#include "../SoAddPrefix.h"
/*
 * knotvector.h - $Revision: 1.1.1.1 $
 */

#include "types.h"

struct Knotvector { /* a knot vector */
			Knotvector( void );
			~Knotvector( void );
    void		init( long, long, long, INREAL * );
    int			validate( void );
    void 		show( char * );

    long		order;		/* order of spline  */
    long		knotcount;	/* number of knots  */
    long		stride;		/* bytes between points */
    Knot *		knotlist;	/* global knot vector */
};

/* tolerance to test knot coincidence */
#if 1
#define TOLERANCE 		10.0e-5
#else
#define TOLERANCE 		1.0e-5
#endif

inline int 
identical( Knot x, Knot y )
{
    return ((x-y) < TOLERANCE) ? 1 : 0;
}
#endif /* __gluknotvector_h_ */
